Chain guard



FIG. 1 is a left perspective view of the chain guard;

FIG. 2 is a rear view of the chain guard shown in FIG. 1;

FIG. 3 is a front view of the chain guard shown in FIG. 1;

FIG. 4 is a right side view of the chain guard shown in FIG. 1;

FIG. 5 is a left side view of the chain guard shown in FIG. 1;

FIG. 6 is a top view of the chain guard shown in FIG. 1; and,

FIG. 7 is a bottom view of the chain guard shown in FIG. 1.

The broken lines shown in the drawings represent unclaimed portions of the chain guard that form no part of the claimed design. 

I claim the ornamental design for a chain guard, as shown and described. 